The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

1. Go to Firefox > Help > Troubleshooting Information.
2. Click the "Reset Firefox" button.
3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
4. Firefox will open with all factory defaults applied.

Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Did this fix your problems? Please report back to us!

As previously written in the question details, I have already tried the "Reset Firefox" and it does not help. Still unable to type anywhere in Firefox or use the keyboard.

Try the Firefox Safe Mode to see how it works there. The Safe Mode is a troubleshooting mode, which disables most add-ons.

(If you're not using it, switch to the Default theme.)

• You can open the Firefox 4.0+ Safe Mode by holding the Shift key when you use the Firefox desktop or Start menu shortcut.
• Or use the Help menu item and click on the Restart with Add-ons Disabled... menu item while Firefox is running.

Don't select anything right now, just use "'Start in Safe Mode" To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before using the Firefox shortcut (without the Shift key) to open it again. If it is good in the Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one.

Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article for that.

When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.

Did you try to reboot the computer?

It is possible that you have switched the keyboard layout by accident to one that doesn't work in Firefox.

• http://support.microsoft.com/kb/258824 - How to change your keyboard layout

Windows remembers the keyboard layout setting per application and you may have changed the keyboard layout by accident via a keyboard shortcut.

• http://windows.microsoft.com/en-US/windows7/The-Language-bar-overview The Language bar (overview)

• Make sure that you have the Language bar visible on the Windows Taskbar
• You can do that via the right-click context menu of the Taskbar: Toolbars > Language Bar

• Check the keyboard language (keyboard layout) setting for the application that has focus via the icon on the Language bar
• You need to do that while Firefox has focus because Windows remembers the keyboard layout setting per application

Control Panel > Regional and Language Options > Keyboards and Languages > Change keyboards > Advanced key settings > Change key sequence

iamjayakumars, As already mentioned in the question details, I have also tried the "Safe Mode" option. still unable to type in the Safe Mode.

To Cor-el, I did reboot the computer. but it did not help the first two reboots. but third time worked like a charm. before the third time and I also disabled the Safe Money option in Kaspersky Internet Security 2013. Seemed to work. thanks

I also have problems with typing. Whenever I want to write into a field (e.g. to write this post) I have to click first into the search bar field, url address field, or to another tab, and after that I am able to write into the desired field. This is in particular annoying if you write a long text and you want to move the cursor with the mouse to another position or if you use Google Docs and want click and to write into specific cells.

I have a Mac with current Mac OS X 10.7 and I - for sure - don't change any settings and I know at least two other persons that have similar problems. Is there a possibility to get the download link to the previous version < 18.0 where I don't observe any of these problems because with the current version I cannot work anymore as I have to work a lot with Google Docs.

Best, Sandra

Try to create a new profile as a test to check if your current profile is causing the problems.

See "Creating a profile":

• https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
• http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues

If the new profile works then you can transfer some files from an existing profile to the new profile, but be careful not to copy corrupted files.

• http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

Same problem here. Anyone able to resolve the issue?

Some have reported that this procedures helped:

Press Fn+Windows Key and then click in the text area to see if this works.
You may have to repeat this a few times.

I'm not on a laptop so I don't have a FN key. But on my desktop F9 + Windows key appears to have resolved the issue for me. Thanks for the help!